871861843428 has 24 divisors (see below), whose sum is σ = 2034895568160. Its totient is φ = 290541862080.

The previous prime is 871861843399. The next prime is 871861843439. The reversal of 871861843428 is 824348168178.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9797913 + ... + 9886496.

It is an arithmetic number, because the mean of its divisors is an integer number (84787315340).

Almost surely, 2^871861843428 is an apocalyptic number.

It is an amenable number.

871861843428 is an abundant number, since it is smaller than the sum of its proper divisors (1163033724732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

871861843428 is a wasteful number, since it uses less digits than its factorization.

871861843428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19688107 (or 19688105 counting only the distinct ones).

The product of its digits is 16515072, while the sum is 60.

The spelling of 871861843428 in words is "eight hundred seventy-one billion, eight hundred sixty-one million, eight hundred forty-three thousand, four hundred twenty-eight".